It’s difficult to imagine how a person could mishear “blew” as “pulling”, much less several people all making the same mistake. But it’s not hard to see why, in the interests of team harmony, Mercedes would want to put the record straight.

Some newspapers appear to have already revised their copy. A search for the quote reveals the following for The Telegraph and The Guardian:

However the text in both articles now reflects Mercedes’ version of the quote:

But Hamilton did smash Rosberg. :)
However Hamilton did say he wouldn’t want to win like Vettel last year. Yet he was obviously quite happy yesterday. Was there any difference? Wonder how Mercedess will deny it.

I’ve been sent a copy of an audio file of the interview by Mercedes. Unfortunately because of rights restrictions I can’t upload it for you. But having listened to it to my ear it does sound more like he said “pulling away”:

It is one thing learning it but being able to apply it doesn’t always work. But today it worked and that is why I was pulling away.

That doesn’t match up word-for-word with the revised Guardian/Telegraph quotes but I think it’s a bit clearer what his meaning was.

As always in F1 it seems that something is controversial if a driver says it but it is ok for the press to say it. In this Sky article they have no issue saying that Hamilton “crushed” Rosberg, though they don’t appear in the list of links Keith provided in the OP.